Magnesium(II) sulfate undecahydrate | SSHADE

Processing math: 64%

Solid phase

Official name: Magnesium(II) sulfate undecahydrate

Name and identifiers

Secondary names: Magnesium sulphate undecahydrate

Family: ionic solid
Class: normal salt
Compound type: sulfate
Comments: Magnesium sulfate undecahydrate occurs as a mineral: Meridianiite

Chemical composition

Formula: $Mg^{2+} \cdot SO_4^{2-} \bullet 11H_2O$
Chemical formula: MgSO4•11H2O
Elemental formula: (Mg2+) S O13 (O-)2 H22
Isotope mixture type: terrestrial abundance

26.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Mg^{2+}$	Magnesium(II) cation	element	1	0.07692307692307693	1	constituent cation	main
	$(SO_4)^{2-}$	Sulfate anion	chemical function	1	0.07692307692307693	1	anionic radical	main
	$H_2O$	Water	molecule	11	0.8461538461538461	1	hydration	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$(SO_4)^{2-}$	1
	$R-OH$	2

Chemical bonds

	Bond	Number
	$\cdot Mg^{2+} \cdot O^{-}-$	2
	$-O \dots H-$	22
	$-O-H$	2
	$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$	4

Class: normal salts (07)
Type: hydrated simple normal salts (07.04)

Associated phases

Equivalent mineral: Meridianiite

Crystallography

Phase type: crystalline
Crystal system: triclinic
Crystal class: pinacoidal
Crystal class symbol: -1 (Ci)
Crystal spacegroup: P-1

Physical properties

Molar mass: 318.55 $g/mol$
Density: 1.512 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-solid	MgSO4.7H2O + H2O	above 2°C (275 K)

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.030
Refraction index $n_{\alpha}$: 1.418
Refraction index $n_{\gamma}$: 1.448
Dispersion V: none
Pure color: colorless
Color: colorless, white
Diaphaneity: transparent
Luster: vitreous

Links and Publications

Links